Improved machine for pointing wire



UNITED STATES PATENT OEEIGE.

ELI J. MANVILLE, OF WATERBUBJY, ASSIGNOR TO O. L. HOPSON AND H. P.

' BROOKS, OF LITCHFIELD COUNTY, CONNECTICUT.

IMPROVED MACHINE FOR POINTING WIRE.

Specification forming part of Letters Patent No. 58,730, dated October 9, 1866.

To all whom it may concern:

Be it known that I, ELI J. MANVILLE, of Va-terbury, in the county of New Haven and State of Connecticut, have invented, made, and applied to use a certain new and useful Improvement in Machinery for Compressing Round or Pointed Articles of Metal g and I do hereby declare the following to be a full, clear, and eXact description of the said invention, reference being had to the annexed drawings, making part of this specification, wherein- Figure lis a longitudinal section of my machine; and Fig. 2 is an end view of the same, the cap-plate being removed.

Similar marks of reference denote the same parts.

In Letters Patent granted to O. L. Hopson and H. P. Brooks, August 9, 1864, and reissued December l2, 1865, and in Letters Patent granted to said Hopson and Brooks as assignees of O. L. Hopson, H. I. Brooks, and E. J. Manville, February 6, 1866, a pair of dies is represented at the end of a revolving shaft. In these patents thepressure was given upon only one of the dies, the movable one, while the other or stationary die derived its resistance and support solely from the revolving shaft; hence the shaft upon the opposite side to the moving'die was liable to considerable friction and wear.

The nature of my said invention consists in a pair of moving dies in a cross slot or mortise in a revolving shaft, in combination with pairs of tappets or toggle-blocks, which cause the said dies to close two or more times each revolution of said shaft and compress, round, or point a piece of wire or rod entered between said dies; and in combination with said dies I employ a pair of screws with tapering points, which determine the amount the dies may separate, and hence the extent of reduction each time the dies are closed. y

In the drawings, a represents the end of a shaft, revolved by competent power; b, the headblock, in which one end of said shaft revolves.

c c are the dies, set in a mortise or slot across the end of said shaft. el d are toggleblocks in pairs, set radially around the shaft a within recesses in the head-block b and e e are springs to cause the blocks d el to return to their normal position after they have been moved by the revolving dies c c. These toggleblocks and springs are each made and operate in the manner set forth in the said patent of Hopson, Brooks, and Manville; and when it is desired to compensate for any wear in the parts, a follower-block, adjusted by a set-screw, may be provided outside of and setting against each of these toggle-blocks. These toggleblocks act in opposite pairs to close the dies c c as many times cach rotation of the shaft a as there are pairs of said toggle-blocks cl d, and the compression upon a wire or rod placed between said dies is effected with no lateral pressure on the exterior of the shaft a, said shaft simply giving rotation to the dies.

It will be evident that pairs ot' adjustable tappets, as in said patent of Hopson and Brooks, might be introduced in place of the toggle-blocks. A

At the end of the shaft a is affixed aI plate, f, through which screws t ilpass. The ends of these screws are conical, and they enter conical cavities in the dies c c. Ifthese screws are turned so as partially to withdraw the conical points the dies can be opened farther by the insertion of a wire or rod into the cavity between them, and the reverse when screwed in, so that the extent of movement of the dies and the consequent compression are regulated as desired. A

The action of this mechanism would be the same if the shaft a remained stationary and the head b and article to be pointed revolved.

Vvhat I claim, and desire to secure by Letiters Patent, is-

1. The shaft a, formed with a cross mortise or slot containing the dies c c, in combination with two or more pairs of toggle-blocks around the said shaft, said pairs of toggles acting alternately' upon the dies inthe manner substantially as set forth.

2. The conical or tapering pointed screws t' t', in combination with the cap f, dies c, shaft ct, and toggle-blocks d d, all arranged as and for the purposes set forth.

In witness whereof I have hereunto set my signature this 14th day of March, A. D. 1866.

E LI J. MANVILLE.

Wvitnesses:

FRANKLIN L. WELTcN, JoEN C. MUNsoN. 

